FATHOM Medium King Mattress 14 Inch Memory Foam Mattress King Size Bed in a Box for Back Pain Relief and Cool Sleep with Gel Foam and Removeable Fiberglass Free Cover, CertiPUR-US Certified
Condition: New
Buy Now, Pay Later
As low as
/ mo
Learn more
- – Up to 36-month term if approved
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
90-day returns
Learn more
90-day refund / replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Sunday, Jun 7
Recently Viewed
Size: King (U.S. Standard)
Style: 14 Inch
Pattern Name: Medium
Features
- Advanced Cooling Comfort: The AeroFusion gel memory foam mattress ensures exceptional breathability and heat dissipation, adapting precisely to your bodys contours while resisting temperature sensitivity. Enjoy cool, cradling comfort no matter the season.
- Premium, Thoughtful Design: Wrapped in a soft, geometric-patterned jacquard fabric with stylish light gray graphene yarn borders. The fiberglass-free mattress cover is not only elegant but functional, featuring a zipper for easy removal and cleaning.
- Motion Isolation Technology: Dynamic memory foam mattress contours to your bodys unique curves, filling gaps to support optimal spinal alignment while effectively lowering motion transfer and noise, ensuring a serene and undisturbed sleep environment where everyone wakes up refreshed, ideal for couples and kids.
- Certified Safe Material: Crafted in the USA with CertiPUR-US foams and globally sourced Oeko-Tex certified fabrics, our king mattress is free from harmful substances. Backed with a 10-year protection, Fathom mattress is designed to promote spinal health and long-term durability for a healthy lifestyle.
- Effortless Setup: The Fathom mattress in a box is vacuum-packed, compressed and rolled for easy movement and installation. Simply open and unroll your memory foam mattress, then enjoy it within 72 hours for full expansion.
Brand: FATHOM
Size: King (U.S. Standard)
Product Dimensions: 80"L x 76"W x 14"Th
Item Weight: 97 Pounds
Item Firmness Description: Medium
Top Style: Gel Top
Cover Material: Polyester
Number of Layers: 4.0
Fill Material: Gel Memory Foam, Memory Foam
Special Feature: Breathable, Durable, Low Motion Transfer, Pressure Relief, Temperature Regulating
Product Dimensions: 80 x 76 x 14 inches
Item Weight: 97 pounds
Manufacturer: FATHOM
Item model number: Medium 14 K
Date First Available: April 23, 2025
Age Range Description: Adult
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Jun 7
Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Size: Queen (U.S. Standard)
Style: 10 Inch
Pattern Name: Medium
I’m really impressed with this Queen Mattress. It arrived neatly packed and expanded quickly with no strong odor. The medium firmness is perfect, supportive enough to help relieve my back pain while still feeling comfortable and cushioning. I also sleep hot, and the gel foam actually makes a noticeable difference in keeping the mattress cool through the night. The removable, fiberglass-free cover is a big plus for peace of mind and easy cleaning. Great quality for the price, and being CertiPUR-US certified makes it even better. Highly recommend!
...
show more
Reviewed in the United States on December 15, 2025 by Miles G
Size: Queen (U.S. Standard)
Style: 10 Inch
Pattern Name: Medium
I bought this for my son and have completely taken over his bed. The mattress arrived in a fairly small box compressed. It didn’t take long after opening for the mattress to expand. It was easy to set up. And for someone that is 9 months pregnant and even sleeping has been uncomfortable and painful.. The mattress itself is extremely comfortable and has helped me to sleep through the night! This is the perfect medium mattress that is supportive but not too hard and not too soft. It has been amazing and I’m not waking up from hip and back pain anymore. It also is very breathable and not like other memory foams that retain a lot of heat.
...
show more
Reviewed in the United States on December 21, 2025 by Cait
Size: Queen (U.S. Standard)
Style: 10 Inch
Pattern Name: Medium
I am extremely satisfied with this mattress. It expanded quickly after unboxing and reached its full shape in just a few hours. The medium firmness is perfect — supportive enough for my back but still soft and comfortable. I sleep cooler now thanks to the gel foam, and I wake up without any back pain. The quality feels premium, especially for the price. Definitely worth it and highly recommended!
...
show more
Reviewed in the United States on November 21, 2025 by Valeriia H Valeriia H
Size: Queen (U.S. Standard)
Style: 10 Inch
Pattern Name: Medium
I recently purchased the FATHOM Medium Queen Mattress (10-Inch Memory Foam), and I couldn’t be happier! The mattress arrived neatly packed in a box and was super easy to unbox and set up — it expanded fully within just a few hours. The medium firmness is perfect — soft enough to contour to my body but firm enough to provide excellent support for my back. I’ve noticed a huge improvement in my sleep quality; I wake up refreshed and without any stiffness or soreness. The memory foam feels premium, and it keeps me cool throughout the night, which is a big plus. For the price, this mattress is an absolute steal. If you’re looking for a comfortable, supportive, and high-quality queen mattress, I highly recommend the FATHOM Medium 10-Inch Memory Foam Mattress. You won’t regret it!
...
show more
Reviewed in the United States on November 7, 2025 by Rakhi
Size: Queen (U.S. Standard)
Style: 10 Inch
Pattern Name: Medium
Surprisingly comfortable and supportive mattress for the price. The queen size fits perfectly on my frame, and it expanded fully within a few hours after unpacking. The surface is firm enough to support the back, yet soft enough to feel cozy — exactly that balance most mattresses fail to get right. No chemical smell, the stitching looks neat, and the edges hold shape well. After a few nights of sleep, no sagging or weird noises. Honestly, I wasn’t expecting it to be this good — finally waking up without back pain. If you’re looking for a solid, comfortable mattress that doesn’t cost a fortune, this one’s a great pick. We easily transported it in the car!
...
show more
Reviewed in the United States on October 29, 2025 by Maksym Bartkov
Size: King (U.S. Standard)
Style: 12 Inch
Pattern Name: Medium
Overall fantastic bed and price. Was disappointed it came with a snag on the zipper cover. I can’t return or replace this because this product expands. Once it expands, you can’t just return it in its original box. It’s a huge, very heavy mattress. So I was disappointed about that.
Reviewed in the United States on December 6, 2025 by Tiffany L
Size: Queen (U.S. Standard)
Style: 10 Inch
Pattern Name: Medium
Honestly, I was pleasantly surprised by this mattress. It has a medium firmness that feels very comfortable—not too hard and not too soft. I’ve been sleeping better since using it, and my back definitely feels better in the mornings. It also stays cool during the night, which is a big plus for a memory foam mattress. I really like that it’s fiberglass-free and CertiPUR-US certified, which gives me peace of mind. It arrived neatly packed in a box, was easy to set up, and expanded quickly. The removable cover is convenient and easy to wash. Overall, it feels well made and is a great value for the price. I would definitely buy it again.
...
show more
Reviewed in the United States on December 17, 2025 by Yamileth
Size: Queen (U.S. Standard)
Style: 12 Inch
Pattern Name: Medium
I’ve been sleeping on this mattress for 3 months now and I’ve spend a lot of days in bed all day, too, since I’ve been sick. I think I can make a preliminary judgment on the mattress by now. It’s actually very comfortable. I haven’t seen any sagging or weak spots yet. It feels very supportive. I can sleep on my back comfortably without pain and I’ve always been a side sleeper. It’s just cushy but firm. It’s not noisy at all. It’s the perfect size to fit exactly on the metal queen frame I had. The sheets have to be tugged at to get them on but once they’re in place they don’t slip around and wrinkle up. The bare mattress is extremely soft to touch. Unfortunately we sleep with a bamboo waterproof bed liner, which heats it up a bit. I feel like it’s going to be a durable bed but you never know. Mattresses don’t last that long these days. It’s a functional bed. It accommodates myself, my husband and our dog just fine. It doesn’t take up too much space in our room and our room isn’t very big. I had ser-tas for my last two mattresses and before that a pur-ple. This mattress is better than all of those. Might as well give it a try! The price is right.
...
show more
Reviewed in the United States on December 14, 2025 by milo101